Meir Achuz's latest activity

What those terms mean physically can only be answered in the context of a physical situation. If you work enough in physics, you will...

"I happen to know that information can't travel faster than light" That doesn't apply in nonrelativistic quantum mechanics.

Lenz's law tells you in what direction a loop will rotate when a magnetic field is turned on.

The UC Berkeley yacht club required backward sailing to pass the test to be able to take out boats. This was important, because...

The probability of annihilation is very low until it hits a heavy plate with a large density of electrons.

The equation, $$\nabla\times{\bf H}=4\pi{\bf j}/c$$, contradicts the continuity equation because, $$\nabla\cdot(\nabla\times{\bf...

A long magnetized rod looks like two magnetic poles, one at each end. You can find the force law just as you would for two electric...

##\nabla_{\vec r}## acts ONLY on ##\vec r##.

Apply the divergence theorem to a surface outside the material where the polarization exists.

If you model the dipole as a plus charge and a minus charge, a distance d apart, you can find the field of each charge by the usual...